CONTAMINANTS
type: Concept

LEAD
type: Concept
change note: 2018-03-07 09:29:12.0 [tstevens] insert Definition (id: null text: A chemical element and a heavy metal that is denser than most common materials. Lead is soft and malleable, and has a relatively low melting point. When freshly cut, lead is bluish-white; it tarnishes to a dull gray color when exposed to air. Lead has the highest atomic number of any stable element and concludes three major decay chains of heavier elements. language code: en);
change note: 2018-03-07 07:54:43.0 [tstevens] Insert Concept add broader relation (LEAD [6fe420c1-2285-4031-babe-f0243c59a617,310669] - CONTAMINANTS [42c6d91b-afef-4638-95c5-0d130828b2e7,84623]);
definition: A chemical element and a heavy metal that is denser than most common materials. Lead is soft and malleable, and has a relatively low melting point. When freshly cut, lead is bluish-white; it tarnishes to a dull gray color when exposed to air. Lead has the highest atomic number of any stable element and concludes three major decay chains of heavier elements.
in scheme: sciencekeywords